<?php
/**
 * Created by JetBrains PhpStorm.
 * User: taoqili
 * Date: 12-7-18
 * Time: 上午11: 32
 * modify: dxk@2016-12-21
 * UEditor编辑器通用上传类
 */
namespace App\Library\Service;

use Symfony\Component\HttpFoundation\File\UploadedFile;

class UeditorUploader
{
    private $fileField; //文件域名
    private $file; //文件上传对象
//    private $base64; //文件上传对象
    private $config; //配置信息
    private $oriName; //原始文件名
    private $fileName; //新文件名
    private $fullName; //存储路径
    private $fileSize; //文件大小
    private $fileType; //文件类型
    private $stateInfo; //上传状态信息,
    private $stateMap = array( //上传状态映射表，国际化用户需考虑此处数据的国际化
        "SUCCESS", //上传成功标记，在UEditor中内不可改变，否则flash判断会出错
        "文件大小超出 upload_max_filesize 限制",
        "文件大小超出 MAX_FILE_SIZE 限制",
        "文件未被完整上传",
        "没有文件被上传",
        "上传文件为空",
        "ERROR_TMP_FILE" => "临时文件错误",
        "ERROR_TMP_FILE_NOT_FOUND" => "找不到临时文件",
        "ERROR_SIZE_EXCEED" => "文件大小超出网站限制",
        "ERROR_TYPE_NOT_ALLOWED" => "文件类型不允许",
        "ERROR_CREATE_DIR" => "目录创建失败",
        "ERROR_DIR_NOT_WRITEABLE" => "目录没有写权限",
        "ERROR_FILE_MOVE" => "文件保存时出错",
        "ERROR_FILE_NOT_FOUND" => "找不到上传文件",
        "ERROR_WRITE_CONTENT" => "写入文件内容错误",
        "ERROR_UNKNOWN" => "未知错误",
        "ERROR_DEAD_LINK" => "链接不可用",
        "ERROR_HTTP_LINK" => "链接不是http链接",
        "ERROR_HTTP_CONTENTTYPE" => "链接contentType不正确",
        "INVALID_URL" => "非法 URL",
        "INVALID_IP" => "非法 IP"
    );
    private $folder = 'editor';//目标文件夹
    private $type = '';

    /**
     * 构造函数
     * @param string $fileField 表单名称
     * @param array $config 配置项
     * @param string $type 是否解析base64编码，可省略。若开启，则$fileField代表的是base64编码的字符串表单名
     */
    public function __construct($fileField, $config, $type = "upload")
    {
        $this->fileField = $fileField;
        $this->config = $config;
        $this->type = $type;
    }

    /**
     * 执行上传
     */
    public function upload()
    {
        if ($this->type == "remote") {
            $this->saveRemote();
        } else if ($this->type == "base64") {
            $this->upBase64();
        } else {
            $this->upFile();
        }
//        $this->stateMap['ERROR_TYPE_NOT_ALLOWED'] = iconv('unicode', 'utf-8', $this->stateMap['ERROR_TYPE_NOT_ALLOWED']);

    }

    /**
     * 目标文件夹
     * @param $folder
     * @return $this
     */
    public function setFolder($folder)
    {
        $this->folder = $folder;
        return $this;
    }

    /**
     * 上传文件的主处理方法
     * @return mixed
     */
    private function upFile()
    {
        $file = $this->file = $_FILES[$this->fileField];
        if (!$file) {
            $this->stateInfo = $this->getStateInfo("ERROR_FILE_NOT_FOUND");
            return;
        }
        if ($this->file['error']) {
            $this->stateInfo = $this->getStateInfo($file['error']);
            return;
        } else if (!file_exists($file['tmp_name'])) {
            $this->stateInfo = $this->getStateInfo("ERROR_TMP_FILE_NOT_FOUND");
            return;
        } else if (!is_uploaded_file($file['tmp_name'])) {
            $this->stateInfo = $this->getStateInfo("ERROR_TMPFILE");
            return;
        }

        $this->oriName = $file['name'];
        $this->fileSize = $file['size'];
        $this->fileType = $this->getFileExt();

        //检查文件大小是否超出限制
        if (!$this->checkSize()) {
            $this->stateInfo = $this->getStateInfo("ERROR_SIZE_EXCEED") . '限制大小' . $this->config["maxSize"];
            return;
        }

        //检查是否不允许的文件格式
        if (!$this->checkType()) {
            $this->stateInfo = $this->getStateInfo("ERROR_TYPE_NOT_ALLOWED");
            return;
        }
        //上传文件
        $UploadedFile = new UploadedFile($file['tmp_name'], $file['name'], $file['type'], $file['error']);
        $Upload = new Upload();
        $dst_dir = $this->folder . DIRECTORY_SEPARATOR . date('YmdHis') . DIRECTORY_SEPARATOR;
        $res = $Upload->setMaxFileSize($this->config["maxSize"])->setIsUploadCloud(true)->uploadFile($UploadedFile, $dst_dir, false, true);
        if (!isset($res['code']) || $res['code'] !== 0) {
            $this->stateInfo = $res['msg'];
        } else {
            $data = $res['data'];
            $this->fileName = $data['file_name'];
            $this->fullName = $data['store_name'];
            $this->stateInfo = $this->stateMap[0];
        }
        return;
    }

    /**
     * 处理base64编码的图片上传
     * @return mixed
     */
    private function upBase64()
    {
        return false;
    }

    /**
     * 拉取远程图片
     * @return mixed
     */
    private function saveRemote()
    {
        $imgUrl = htmlspecialchars($this->fileField);
        $Upload = new Upload();
        $res = $Upload->saveRemoteImg($imgUrl, $this->folder, 3);
        if (!isset($res['code']) || $res['code'] !== 0) {
            $this->stateInfo = $res['msg'];
        } else {
            $data = $res['data'];
            $this->oriName = $data['original_name'];
            $this->fileSize = $data['file_size'];
            $this->fileType = $this->getFileExt();
            $this->fileName = $data['file_name'];
            $this->fullName = $data['store_name'];
            $this->stateInfo = $this->stateMap[0];
        }
        return;
    }

    /**
     * 上传错误检查
     * @param $errCode
     * @return string
     */
    private function getStateInfo($errCode)
    {
        return !$this->stateMap[$errCode] ? $this->stateMap["ERROR_UNKNOWN"] : $this->stateMap[$errCode];
    }

    /**
     * 获取文件扩展名
     * @return string
     */
    private function getFileExt()
    {
        return strtolower(strrchr($this->oriName, '.'));
    }

    /**
     * 文件类型检测
     * @return bool
     */
    private function checkType()
    {
        return in_array($this->getFileExt(), $this->config["allowFiles"]);
    }

    /**
     * 文件大小检测
     * @return bool
     */
    private function checkSize()
    {
        return $this->fileSize <= ($this->config["maxSize"]);
    }

    /**
     * 获取当前上传成功文件的各项信息
     * @return array
     */
    public function getFileInfo()
    {
        $url = easy_cloud_attached($this->fullName);
//        if (in_array($this->fileType, [".png", ".jpg", ".jpeg", ".gif", ".bmp"])) {
//            $url .= '_1000x30000.jpg';
//        }
        return array(
            "state" => $this->stateInfo,
            "url" => $url,//easy_cloud_attached($this->fullName),
            "store_path" => $this->fullName,
            "title" => $this->fileName,
            "original" => $this->oriName,
            "type" => $this->fileType,
            "size" => $this->fileSize
        );
    }
}
